Fire-alarm and signaling device.



No. 874,250. I PATENTED DEC. 17, I907. L". SAOKWITZ.

FIRE ALARM AND SIGNALING DEVICE.

APPLICATION FILED KAY-14, 1907.

INVENTOR WITNESSES swim THE mmms PETERS 1:17., wasmuarom, n. z:v

LOUIS SAOKWITZ, OF ST. LOUIS, MISSOURI.

FIRE-ALARM AND SIGNALING DEVICE.

Specification of Letters Patent.

Patented Dec. 17, 1907.

Application filed May 14. 1907. Serial No. 373,689.

To all whom it may concern:

Be it known that I, Louis SACKWITZ, a citizen of the United States, andresident of St. Louis, Missouri, have invented certain new and usefulImprovements in Fire-Alarm and Signaling Devices, of which the followingis a specification.

This invention relates to improvements in a fire alarm and signalingdevice, and consists in the novel arrangement, construction, andcombination of parts as will be fully hereinafter described and claimed.

The object of my invention is to construct a device to be attached to asystem of wiring and arranged with a strip of material which will meltat a certain degree of heat, andautomatically make contact to signal theoffice as well as the nearest fire company and indicate the premiseswhich are on fire.

A fiuther object of my invention is to properly wire a factory, businesshouse or residence, a device being connected to the wiring at intervalsapart and so arranged as to complete a circuit and make an alarin whenone of the devices is contacted with by a flame or certain degree ofheat.

In the drawings: Figure 1 is a diagrammatic view showing a system ofwiring with my invention located at intervals apart connected to thewiring. Fig. 2 is a perspective view of the automatic switch-head madeuse of in carrying out my invention, showing the fuse in position. Fig.3 is a perspective view of the same with the fuse removed. Fig. 4 is adetail perspective view of the fuse. Fig. 5 is a detail perspective viewof one of the contact plates connected to the head.

In the construction of my invention I provide a suitable block or head6, its one end provided with a projection 7 having a tooth 8. On theedge of the block 6 I secure a contact plate 9 having an extending strip10 and a right angular projection 11. The strip 10 and the plate 9 areattached to the head in any desirable manner at the point indicated bythe numeral 12, the projection 11 extending upwardly and a reasonabledistance away from the edge 13 of the block, and on the edge 13 isplaced a spring contact strip 14 which is attached to and held to thehead at the point indicated by the numeral 15. The free end of thespring contact strip is provided. with a tooth 16 on which is placed thefuse 17 and held in position by means of the opening 18 formed in oneend thereof. The other end of the fuse is held in position upon thetooth 8 of the head by means of the elongated aperture 19 and the saidfuse is of sufficient length when placed in position upon the tooth Sand 16 as to hold the spring contact strip 14 in a depressed position soas not to contact with the projection 11 until the said fuse has beenremoved from the teeth by either a flame or certain degree of heatwhich'will then permit the spring contact strip to complete a circuit bycontacting with the projection 11. To the contact plates 9 and 15 areconnected, by means of screws 20 or the like, wires 21 and the oppositeends of said wires are connected to the line wires 22 and 23 strungthrough the building.

By referring to Fig. 1 I show a diagrammatic view of the location of theheads and their connection to the wires and the said wiring in thebuilding is so arranged that the one end of the wire 22 is connected toone pole 24 of a switch 25 which is located in any convenient part ofthe building and the said switch is to be in closed position while thesystem is in operative order. This switch is connected to a wire leadingto the battery 26 and from the battery is a wire 27 which leads to onepole of an annunciator 28 located in the nearest fire company house. Tothe wire 27 is connected a wire 29 which leads to an electric bell 30,preferably located in the office of the building in which my device isinstalled and to the other pole of the electric bell 30 is attached oneend of the wire 23. To the wire 23 is connected a wire 31 which leads tothe other pole of the annunciator which forms a complete circuit whenthe switch 25 is thrown in contact whenever the circuit of any of theautomatic switch heads is closed. In addition to the automatic switchheads I provide a switch 32, one pole connecting with the wire 23, theother with the Wire 22. The obj eot of this switch when closed is tocreate the alarm whenever a fire is discovered by any of the workmen,and the said switch is located in a convenient position so that accessmay readily be had thereto, and the said switch has been arranged forconvenience to make an alarm whenever a fire is discovered before thefire has an opfportunity to come in contact with any one o the automaticswitch heads.

When any one of the switch heads throughout the building is operated thealarms both in the office and in the fire company house aresimultaneously operated and by means of the annunciator the fire companycan readily ascertain the locality of the conflagration and the buildingin Whichit is located.

I have found by experience that it is preferable to construct the fuseof a very thin strip of celluloid which will give readily to a flame orhigh degree of heat.

Having fully described my invention, What I claim is:

A device of the class described, comprising an elongated flattened head,a contact plate located on one edge of the head, a strip provided with aright angular projection connected to one side of the head and formedintegral with the contact plate, a spring contact plate located on theopposite edge of the head, a tooth formed on the head, a fuse attachedto the tooth and to the spring contact plate to hold the same out ofcontact with the right angular projection of the opposite contact plate,both of said contact plates being connected to wiring located in abuilding and the said heads arranged at intervals apart throughout thebuilding to automatically create an alarm in the oflice as Well as thefire company house Whenever one of the fuses becomes detached from thehead, substantially as specified.

In testimony whereof, I have signed my name to this specification, inpresence of two subscribing Witnesses.

LOUIS SACKWITZ.

Witnesses:

ALFRED A. EroKs, WV LTER C. STEIN.

